40030513128 has 72 divisors (see below), whose sum is σ = 114422472450. Its totient is φ = 12641206464.

The previous prime is 40030513091. The next prime is 40030513141. The reversal of 40030513128 is 82131503004.

It is a happy number.

40030513128 is a `hidden beast` number, since 40 + 0 + 305 + 1 + 312 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23931471204 + 16099041924 = 154698^2 + 126882^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 744063 + ... + 796046.

Almost surely, 2^40030513128 is an apocalyptic number.

It is an amenable number.

40030513128 is an abundant number, since it is smaller than the sum of its proper divisors (74391959322).

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

40030513128 is a wasteful number, since it uses less digits than its factorization.

40030513128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540159 (or 1540133 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The spelling of 40030513128 in words is "forty billion, thirty million, five hundred thirteen thousand, one hundred twenty-eight".