78100470 has 192 divisors, whose sum is σ = 251665920. Its totient is φ = 16873920.

The previous prime is 78100441. The next prime is 78100487. The reversal of 78100470 is 7400187.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1816269 + ... + 1816311.

It is an arithmetic number, because the mean of its divisors is an integer number (1310760).

Almost surely, 2^78100470 is an apocalyptic number.

78100470 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 78100470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125832960).

78100470 is an abundant number, since it is smaller than the sum of its proper divisors (173565450).

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

78100470 is a wasteful number, since it uses less digits than its factorization.

78100470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 78100470 is about 8837.4470295442. The cubic root of 78100470 is about 427.4492398950.

The spelling of 78100470 in words is "seventy-eight million, one hundred thousand, four hundred seventy".