78916740 has 48 divisors (see below), whose sum is σ = 252534912. Its totient is φ = 18038016.

The previous prime is 78916727. The next prime is 78916741. The reversal of 78916740 is 4761987.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 78916692 and 78916701.

It is not an unprimeable number, because it can be changed into a prime (78916741) 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, 93529 + ... + 94368.

It is an arithmetic number, because the mean of its divisors is an integer number (5261144).

Almost surely, 2^78916740 is an apocalyptic number.

78916740 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78916740 is an abundant number, since it is smaller than the sum of its proper divisors (173618172).

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

78916740 is a wasteful number, since it uses less digits than its factorization.

78916740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187916 (or 187914 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 78916740 is about 8883.5094416565. The cubic root of 78916740 is about 428.9332490511.

The spelling of 78916740 in words is "seventy-eight million, nine hundred sixteen thousand, seven hundred forty".