40057797 has 32 divisors (see below), whose sum is σ = 62899200. Its totient is φ = 22440960.

The previous prime is 40057781. The next prime is 40057837. The reversal of 40057797 is 79775004.

It is not a de Polignac number, because 40057797 - 2⁴ = 40057781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40057727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19579 + ... + 21527.

It is an arithmetic number, because the mean of its divisors is an integer number (1965600).

Almost surely, 2^40057797 is an apocalyptic number.

It is an amenable number.

40057797 is a deficient number, since it is larger than the sum of its proper divisors (22841403).

40057797 is a wasteful number, since it uses less digits than its factorization.

40057797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2013.

The product of its (nonzero) digits is 61740, while the sum is 39.

The square root of 40057797 is about 6329.1229250189. The cubic root of 40057797 is about 342.1598291963.

The spelling of 40057797 in words is "forty million, fifty-seven thousand, seven hundred ninety-seven".