78790530 has 256 divisors, whose sum is σ = 258048000. Its totient is φ = 15240960.

The previous prime is 78790519. The next prime is 78790531. The reversal of 78790530 is 3509787.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78790531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2541615 + ... + 2541645.

It is an arithmetic number, because the mean of its divisors is an integer number (1008000).

Almost surely, 2^78790530 is an apocalyptic number.

78790530 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78790530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129024000).

78790530 is an abundant number, since it is smaller than the sum of its proper divisors (179257470).

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

78790530 is a wasteful number, since it uses less digits than its factorization.

78790530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 78790530 is about 8876.4029876972. The cubic root of 78790530 is about 428.7044655239.

The spelling of 78790530 in words is "seventy-eight million, seven hundred ninety thousand, five hundred thirty".