78570492 has 192 divisors, whose sum is σ = 255295488. Its totient is φ = 18144000.

The previous prime is 78570469. The next prime is 78570509. The reversal of 78570492 is 29407587.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 372267 + ... + 372477.

It is an arithmetic number, because the mean of its divisors is an integer number (1329664).

Almost surely, 2^78570492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78570492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127647744).

78570492 is an abundant number, since it is smaller than the sum of its proper divisors (176724996).

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

78570492 is a wasteful number, since it uses less digits than its factorization.

78570492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 78570492 is about 8863.9997743682. Note that the first 3 decimals coincide. The cubic root of 78570492 is about 428.3050130239.

The spelling of 78570492 in words is "seventy-eight million, five hundred seventy thousand, four hundred ninety-two".