40779520 has 36 divisors (see below), whose sum is σ = 97682760. Its totient is φ = 16311296.

The previous prime is 40779517. The next prime is 40779521. The reversal of 40779520 is 2597704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40779521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14650 + ... + 17209.

It is an arithmetic number, because the mean of its divisors is an integer number (2713410).

Almost surely, 2^40779520 is an apocalyptic number.

40779520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40779520 is an abundant number, since it is smaller than the sum of its proper divisors (56903240).

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

40779520 is an equidigital number, since it uses as much as digits as its factorization.

40779520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31880 (or 31866 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 40779520 is about 6385.8844336552. The cubic root of 40779520 is about 344.2025128107.

The spelling of 40779520 in words is "forty million, seven hundred seventy-nine thousand, five hundred twenty".