78245372 has 6 divisors (see below), whose sum is σ = 136929408. Its totient is φ = 39122684.

The previous prime is 78245369. The next prime is 78245389. The reversal of 78245372 is 27354287.

It is a super-2 number, since 2×78245372² = 12244676478836768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9780668 + ... + 9780675.

It is an arithmetic number, because the mean of its divisors is an integer number (22821568).

Almost surely, 2^78245372 is an apocalyptic number.

It is an amenable number.

78245372 is a deficient number, since it is larger than the sum of its proper divisors (58684036).

78245372 is a wasteful number, since it uses less digits than its factorization.

78245372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19561347 (or 19561345 counting only the distinct ones).

The product of its digits is 94080, while the sum is 38.

The square root of 78245372 is about 8845.6414125828. The cubic root of 78245372 is about 427.7134294444.

The spelling of 78245372 in words is "seventy-eight million, two hundred forty-five thousand, three hundred seventy-two".