78294930 has 32 divisors (see below), whose sum is σ = 214752384. Its totient is φ = 17895936.

The previous prime is 78294929. The next prime is 78294941. The reversal of 78294930 is 3949287.

It is a super-2 number, since 2×78294930² = 12260192127409800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186207 + ... + 186626.

It is an arithmetic number, because the mean of its divisors is an integer number (6711012).

Almost surely, 2^78294930 is an apocalyptic number.

78294930 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78294930 is an abundant number, since it is smaller than the sum of its proper divisors (136457454).

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

78294930 is a wasteful number, since it uses less digits than its factorization.

78294930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372850.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 78294930 is about 8848.4422357837. The cubic root of 78294930 is about 427.8037101774.

The spelling of 78294930 in words is "seventy-eight million, two hundred ninety-four thousand, nine hundred thirty".