78020472 has 16 divisors (see below), whose sum is σ = 195051240. Its totient is φ = 26006816.

The previous prime is 78020407. The next prime is 78020473. The reversal of 78020472 is 27402087.

It is a super-2 number, since 2×78020472² = 12174388102205568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78020473) 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, 1625403 + ... + 1625450.

Almost surely, 2^78020472 is an apocalyptic number.

It is an amenable number.

78020472 is an abundant number, since it is smaller than the sum of its proper divisors (117030768).

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

78020472 is a wasteful number, since it uses less digits than its factorization.

78020472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3250862 (or 3250858 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 78020472 is about 8832.9197890618. The cubic root of 78020472 is about 427.3032451857.

The spelling of 78020472 in words is "seventy-eight million, twenty thousand, four hundred seventy-two".