78492970 has 16 divisors (see below), whose sum is σ = 143604648. Its totient is φ = 30882240.

The previous prime is 78492959. The next prime is 78493007. The reversal of 78492970 is 7929487.

It can be written as a sum of positive squares in 4 ways, for example, as 54863649 + 23629321 = 7407^2 + 4861^2 .

It is a super-2 number, since 2×78492970² = 12322292678841800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78492970.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63729 + ... + 64948.

Almost surely, 2^78492970 is an apocalyptic number.

78492970 is a deficient number, since it is larger than the sum of its proper divisors (65111678).

78492970 is a wasteful number, since it uses less digits than its factorization.

78492970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128745.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 78492970 is about 8859.6258386006. The cubic root of 78492970 is about 428.1641035198.

The spelling of 78492970 in words is "seventy-eight million, four hundred ninety-two thousand, nine hundred seventy".