78406230 has 32 divisors (see below), whose sum is σ = 215057664. Its totient is φ = 17921376.

The previous prime is 78406201. The next prime is 78406249. The reversal of 78406230 is 3260487.

It is a super-2 number, since 2×78406230² = 12295073805625800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 186472 + ... + 186891.

It is an arithmetic number, because the mean of its divisors is an integer number (6720552).

Almost surely, 2^78406230 is an apocalyptic number.

78406230 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78406230 is an abundant number, since it is smaller than the sum of its proper divisors (136651434).

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

78406230 is a wasteful number, since it uses less digits than its factorization.

78406230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373380.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 78406230 is about 8854.7292448725. The cubic root of 78406230 is about 428.0063286979.

The spelling of 78406230 in words is "seventy-eight million, four hundred six thousand, two hundred thirty".