78526770 has 32 divisors (see below), whose sum is σ = 215388288. Its totient is φ = 17948928.

The previous prime is 78526769. The next prime is 78526783. The reversal of 78526770 is 7762587.

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

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 186759 + ... + 187178.

It is an arithmetic number, because the mean of its divisors is an integer number (6730884).

Almost surely, 2^78526770 is an apocalyptic number.

78526770 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78526770 is an abundant number, since it is smaller than the sum of its proper divisors (136861518).

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

78526770 is a wasteful number, since it uses less digits than its factorization.

78526770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373954.

The product of its (nonzero) digits is 164640, while the sum is 42.

The square root of 78526770 is about 8861.5331630593. The cubic root of 78526770 is about 428.2255522072.

The spelling of 78526770 in words is "seventy-eight million, five hundred twenty-six thousand, seven hundred seventy".