40625280 has 128 divisors (see below), whose sum is σ = 143942400. Its totient is φ = 10828800.

The previous prime is 40625279. The next prime is 40625293. The reversal of 40625280 is 8252604.

40625280 is a `hidden beast` number, since 406 + 252 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (27).

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 15 ways as a sum of consecutive naturals, for example, 16105 + ... + 18455.

It is an arithmetic number, because the mean of its divisors is an integer number (1124550).

Almost surely, 2^40625280 is an apocalyptic number.

40625280 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 40625280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71971200).

40625280 is an abundant number, since it is smaller than the sum of its proper divisors (103317120).

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

40625280 is a wasteful number, since it uses less digits than its factorization.

40625280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2379 (or 2361 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 40625280 is about 6373.7963569603. The cubic root of 40625280 is about 343.7680065499.

Adding to 40625280 its reverse (8252604), we get a palindrome (48877884).

The spelling of 40625280 in words is "forty million, six hundred twenty-five thousand, two hundred eighty".