40022019978 has 16 divisors (see below), whose sum is σ = 80048218080. Its totient is φ = 13339976976.

The previous prime is 40022019971. The next prime is 40022019991. The reversal of 40022019978 is 87991022004.

It is a super-2 number, since 2×40022019978² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40022019971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41833 + ... + 285996.

It is an arithmetic number, because the mean of its divisors is an integer number (5003013630).

Almost surely, 2^40022019978 is an apocalyptic number.

40022019978 is an abundant number, since it is smaller than the sum of its proper divisors (40026198102).

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

40022019978 is a wasteful number, since it uses less digits than its factorization.

40022019978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348181.

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 40022019978 in words is "forty billion, twenty-two million, nineteen thousand, nine hundred seventy-eight".