78403532 has 6 divisors (see below), whose sum is σ = 137206188. Its totient is φ = 39201764.

The previous prime is 78403531. The next prime is 78403537. The reversal of 78403532 is 23530487.

It is a happy number.

It is a super-2 number, since 2×78403532² = 12294227660150048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78403531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9800438 + ... + 9800445.

It is an arithmetic number, because the mean of its divisors is an integer number (22867698).

Almost surely, 2^78403532 is an apocalyptic number.

It is an amenable number.

78403532 is a deficient number, since it is larger than the sum of its proper divisors (58802656).

78403532 is a wasteful number, since it uses less digits than its factorization.

78403532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19600887 (or 19600885 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 78403532 is about 8854.5768955947. The cubic root of 78403532 is about 428.0014193332.

The spelling of 78403532 in words is "seventy-eight million, four hundred three thousand, five hundred thirty-two".