78477030 has 48 divisors (see below), whose sum is σ = 214783920. Its totient is φ = 19825344.

The previous prime is 78477029. The next prime is 78477053. The reversal of 78477030 is 3077487.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21237 + ... + 24656.

It is an arithmetic number, because the mean of its divisors is an integer number (4474665).

Almost surely, 2^78477030 is an apocalyptic number.

78477030 is an abundant number, since it is smaller than the sum of its proper divisors (136306890).

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

78477030 is a wasteful number, since it uses less digits than its factorization.

78477030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45925 (or 45922 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 78477030 is about 8858.7262064024. The cubic root of 78477030 is about 428.1351183429.

The spelling of 78477030 in words is "seventy-eight million, four hundred seventy-seven thousand, thirty".