70890025 has 48 divisors (see below), whose sum is σ = 97993728. Its totient is φ = 50688000.

The previous prime is 70890023. The next prime is 70890031. The reversal of 70890025 is 52009807.

It is not a de Polignac number, because 70890025 - 2¹ = 70890023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70890023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 730777 + ... + 730873.

It is an arithmetic number, because the mean of its divisors is an integer number (2041536).

Almost surely, 2^70890025 is an apocalyptic number.

It is an amenable number.

70890025 is a deficient number, since it is larger than the sum of its proper divisors (27103703).

70890025 is a wasteful number, since it uses less digits than its factorization.

70890025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 70890025 is about 8419.6214285442. The cubic root of 70890025 is about 413.8678680140.

The spelling of 70890025 in words is "seventy million, eight hundred ninety thousand, twenty-five".