78492510 has 64 divisors (see below), whose sum is σ = 212486400. Its totient is φ = 20614176.

The previous prime is 78492509. The next prime is 78492529. The reversal of 78492510 is 1529487.

It is a super-2 number, since 2×78492510² = 12322148252200200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15921 + ... + 20259.

It is an arithmetic number, because the mean of its divisors is an integer number (3320100).

Almost surely, 2^78492510 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78492510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106243200).

78492510 is an abundant number, since it is smaller than the sum of its proper divisors (133993890).

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

78492510 is a wasteful number, since it uses less digits than its factorization.

78492510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4422 (or 4416 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 78492510 is about 8859.5998780983. The cubic root of 78492510 is about 428.1632671142.

The spelling of 78492510 in words is "seventy-eight million, four hundred ninety-two thousand, five hundred ten".