78249030 has 32 divisors (see below), whose sum is σ = 197683200. Its totient is φ = 19768032.

The previous prime is 78249023. The next prime is 78249091. The reversal of 78249030 is 3094287.

It is a super-2 number, since 2×78249030² = 12245821391881800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78248982 and 78249000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68070 + ... + 69209.

It is an arithmetic number, because the mean of its divisors is an integer number (6177600).

Almost surely, 2^78249030 is an apocalyptic number.

78249030 is an abundant number, since it is smaller than the sum of its proper divisors (119434170).

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

78249030 is a wasteful number, since it uses less digits than its factorization.

78249030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137308.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 78249030 is about 8845.8481786655. The cubic root of 78249030 is about 427.7200945940.

The spelling of 78249030 in words is "seventy-eight million, two hundred forty-nine thousand, thirty".