40642400 has 72 divisors (see below), whose sum is σ = 100399824. Its totient is φ = 16064000.

The previous prime is 40642397. The next prime is 40642411. The reversal of 40642400 is 424604.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80549 + ... + 81051.

It is an arithmetic number, because the mean of its divisors is an integer number (1394442).

Almost surely, 2^40642400 is an apocalyptic number.

40642400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40642400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50199912).

40642400 is an abundant number, since it is smaller than the sum of its proper divisors (59757424).

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

40642400 is a wasteful number, since it uses less digits than its factorization.

40642400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 40642400 is about 6375.1392141662. The cubic root of 40642400 is about 343.8162891443.

The spelling of 40642400 in words is "forty million, six hundred forty-two thousand, four hundred".