40430403239978 has 32 divisors (see below), whose sum is σ = 61825035697920. Its totient is φ = 19825943745600.

The previous prime is 40430403239951. The next prime is 40430403240041. The reversal of 40430403239978 is 87993230403404.

It is a super-2 number, since 2×40430403239978² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79959551 + ... + 80463597.

It is an arithmetic number, because the mean of its divisors is an integer number (1932032365560).

Almost surely, 2^{40430403239978} is an apocalyptic number.

40430403239978 is a deficient number, since it is larger than the sum of its proper divisors (21394632457942).

40430403239978 is a wasteful number, since it uses less digits than its factorization.

40430403239978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507902.

The product of its (nonzero) digits is 15676416, while the sum is 56.

The spelling of 40430403239978 in words is "forty trillion, four hundred thirty billion, four hundred three million, two hundred thirty-nine thousand, nine hundred seventy-eight".