40000400037 has 24 divisors (see below), whose sum is σ = 63396870264. Its totient is φ = 24151181184.

The previous prime is 40000399991. The next prime is 40000400039. The reversal of 40000400037 is 73000400004.

It can be written as a sum of positive squares in 4 ways, for example, as 5918071041 + 34082328996 = 76929^2 + 184614^2 .

It is not a de Polignac number, because 40000400037 - 2²⁷ = 39866182309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40000399992 and 40000400019.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40000400039) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3219118 + ... + 3231519.

It is an arithmetic number, because the mean of its divisors is an integer number (2641536261).

Almost surely, 2^40000400037 is an apocalyptic number.

It is an amenable number.

40000400037 is a deficient number, since it is larger than the sum of its proper divisors (23396470227).

40000400037 is a wasteful number, since it uses less digits than its factorization.

40000400037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6450709 (or 6450706 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The spelling of 40000400037 in words is "forty billion, four hundred thousand, thirty-seven".