70265778 has 64 divisors (see below), whose sum is σ = 161132544. Its totient is φ = 20232000.

The previous prime is 70265749. The next prime is 70265803. The reversal of 70265778 is 87756207.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124525 + ... + 125087.

It is an arithmetic number, because the mean of its divisors is an integer number (2517696).

Almost surely, 2^70265778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70265778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80566272).

70265778 is an abundant number, since it is smaller than the sum of its proper divisors (90866766).

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

70265778 is a wasteful number, since it uses less digits than its factorization.

70265778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671.

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

The square root of 70265778 is about 8382.4684908444. The cubic root of 70265778 is about 412.6494650283.

The spelling of 70265778 in words is "seventy million, two hundred sixty-five thousand, seven hundred seventy-eight".