40619840 has 56 divisors (see below), whose sum is σ = 100949760. Its totient is φ = 15538688.

The previous prime is 40619837. The next prime is 40619857. The reversal of 40619840 is 4891604.

40619840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 40619797 and 40619806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4601 + ... + 10119.

Almost surely, 2^40619840 is an apocalyptic number.

40619840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

40619840 is the 3680-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40619840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50474880).

40619840 is an abundant number, since it is smaller than the sum of its proper divisors (60329920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40619840 is a wasteful number, since it uses less digits than its factorization.

40619840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5559 (or 5549 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 40619840 is about 6373.3695954338. The cubic root of 40619840 is about 343.7526615772.

The spelling of 40619840 in words is "forty million, six hundred nineteen thousand, eight hundred forty".