70128045 has 64 divisors (see below), whose sum is σ = 138700800. Its totient is φ = 33384960.

The previous prime is 70128041. The next prime is 70128053. The reversal of 70128045 is 54082107.

It is not a de Polignac number, because 70128045 - 2² = 70128041 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70128041) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 53761 + ... + 55049.

It is an arithmetic number, because the mean of its divisors is an integer number (2167200).

Almost surely, 2^70128045 is an apocalyptic number.

It is an amenable number.

70128045 is a deficient number, since it is larger than the sum of its proper divisors (68572755).

70128045 is a wasteful number, since it uses less digits than its factorization.

70128045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347 (or 1341 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 70128045 is about 8374.2489215451. The cubic root of 70128045 is about 412.3796673799.

The spelling of 70128045 in words is "seventy million, one hundred twenty-eight thousand, forty-five".