78231460 has 12 divisors (see below), whose sum is σ = 164286108. Its totient is φ = 31292576.

The previous prime is 78231451. The next prime is 78231481. The reversal of 78231460 is 6413287.

It can be written as a sum of positive squares in 2 ways, for example, as 44195904 + 34035556 = 6648^2 + 5834^2 .

It is a super-2 number, since 2×78231460² = 12240322667463200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1955767 + ... + 1955806.

It is an arithmetic number, because the mean of its divisors is an integer number (13690509).

Almost surely, 2^78231460 is an apocalyptic number.

It is an amenable number.

78231460 is an abundant number, since it is smaller than the sum of its proper divisors (86054648).

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

78231460 is a wasteful number, since it uses less digits than its factorization.

78231460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911582 (or 3911580 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 78231460 is about 8844.8550016380. The cubic root of 78231460 is about 427.6880788421.

The spelling of 78231460 in words is "seventy-eight million, two hundred thirty-one thousand, four hundred sixty".