78103772 has 12 divisors (see below), whose sum is σ = 137725896. Its totient is φ = 38753520.

The previous prime is 78103771. The next prime is 78103793. The reversal of 78103772 is 27730187.

It is a super-2 number, since 2×78103772² = 12200398401255968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78103771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74003 + ... + 75050.

It is an arithmetic number, because the mean of its divisors is an integer number (11477158).

Almost surely, 2^78103772 is an apocalyptic number.

It is an amenable number.

78103772 is a deficient number, since it is larger than the sum of its proper divisors (59622124).

78103772 is a wasteful number, since it uses less digits than its factorization.

78103772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149188 (or 149186 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 78103772 is about 8837.6338462283. The cubic root of 78103772 is about 427.4552638344.

The spelling of 78103772 in words is "seventy-eight million, one hundred three thousand, seven hundred seventy-two".