40387658434 has 8 divisors (see below), whose sum is σ = 60597867708. Its totient is φ = 20188369200.

The previous prime is 40387658431. The next prime is 40387658551. The reversal of 40387658434 is 43485678304.

It can be written as a sum of positive squares in 2 ways, for example, as 37583638225 + 2804020209 = 193865^2 + 52953^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (40387658431) 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, 2720757 + ... + 2735560.

Almost surely, 2^40387658434 is an apocalyptic number.

40387658434 is a deficient number, since it is larger than the sum of its proper divisors (20210209274).

40387658434 is a wasteful number, since it uses less digits than its factorization.

40387658434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5460020.

The product of its (nonzero) digits is 7741440, while the sum is 52.

The spelling of 40387658434 in words is "forty billion, three hundred eighty-seven million, six hundred fifty-eight thousand, four hundred thirty-four".