40438029948 has 24 divisors (see below), whose sum is σ = 99905721552. Its totient is φ = 12686440704.

The previous prime is 40438029937. The next prime is 40438029953. The reversal of 40438029948 is 84992083404.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 40438029948.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99112615 + ... + 99113022.

It is an arithmetic number, because the mean of its divisors is an integer number (4162738398).

Almost surely, 2^40438029948 is an apocalyptic number.

It is an amenable number.

40438029948 is an abundant number, since it is smaller than the sum of its proper divisors (59467691604).

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

40438029948 is a wasteful number, since it uses less digits than its factorization.

40438029948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198225661 (or 198225659 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 40438029948 in words is "forty billion, four hundred thirty-eight million, twenty-nine thousand, nine hundred forty-eight".