78453472 has 12 divisors (see below), whose sum is σ = 154455336. Its totient is φ = 39226720.

The previous prime is 78453469. The next prime is 78453491. The reversal of 78453472 is 27435487.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1225804 + ... + 1225867.

It is an arithmetic number, because the mean of its divisors is an integer number (12871278).

Almost surely, 2^78453472 is an apocalyptic number.

It is an amenable number.

78453472 is a deficient number, since it is larger than the sum of its proper divisors (76001864).

78453472 is a wasteful number, since it uses less digits than its factorization.

78453472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451681 (or 2451673 counting only the distinct ones).

The product of its digits is 188160, while the sum is 40.

The square root of 78453472 is about 8857.3964571989. The cubic root of 78453472 is about 428.0922734641.

The spelling of 78453472 in words is "seventy-eight million, four hundred fifty-three thousand, four hundred seventy-two".