70745730 has 32 divisors (see below), whose sum is σ = 185226048. Its totient is φ = 17150400.

The previous prime is 70745713. The next prime is 70745737. The reversal of 70745730 is 3754707.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 70745691 and 70745700.

It is not an unprimeable number, because it can be changed into a prime (70745737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106861 + ... + 107520.

It is an arithmetic number, because the mean of its divisors is an integer number (5788314).

Almost surely, 2^70745730 is an apocalyptic number.

70745730 is an abundant number, since it is smaller than the sum of its proper divisors (114480318).

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

70745730 is a wasteful number, since it uses less digits than its factorization.

70745730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214402.

The product of its (nonzero) digits is 20580, while the sum is 33.

The square root of 70745730 is about 8411.0480916471. The cubic root of 70745730 is about 413.5868711280.

The spelling of 70745730 in words is "seventy million, seven hundred forty-five thousand, seven hundred thirty".