78289971004 has 48 divisors (see below), whose sum is σ = 167340079872. Its totient is φ = 31283995392.

The previous prime is 78289970887. The next prime is 78289971007. The reversal of 78289971004 is 40017998287.

It is a happy number.

It is a super-2 number, since 2×78289971004² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78289971007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 717642 + ... + 819505.

It is an arithmetic number, because the mean of its divisors is an integer number (3486251664).

Almost surely, 2^78289971004 is an apocalyptic number.

It is an amenable number.

78289971004 is an abundant number, since it is smaller than the sum of its proper divisors (89050108868).

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

78289971004 is a wasteful number, since it uses less digits than its factorization.

78289971004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537282 (or 1537280 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 55.

The spelling of 78289971004 in words is "seventy-eight billion, two hundred eighty-nine million, nine hundred seventy-one thousand, four".