38407370778 has 128 divisors (see below), whose sum is σ = 101922508800. Its totient is φ = 10482094656.

The previous prime is 38407370731. The next prime is 38407370783. The reversal of 38407370778 is 87707370483.

It is a super-2 number, since 2×38407370778² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7413393 + ... + 7418571.

It is an arithmetic number, because the mean of its divisors is an integer number (796269600).

Almost surely, 2^38407370778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38407370778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50961254400).

38407370778 is an abundant number, since it is smaller than the sum of its proper divisors (63515138022).

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

38407370778 is a wasteful number, since it uses less digits than its factorization.

38407370778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6073 (or 6067 counting only the distinct ones).

The product of its (nonzero) digits is 5531904, while the sum is 54.

The spelling of 38407370778 in words is "thirty-eight billion, four hundred seven million, three hundred seventy thousand, seven hundred seventy-eight".