70985450 has 24 divisors (see below), whose sum is σ = 133711680. Its totient is φ = 28033200.

The previous prime is 70985449. The next prime is 70985459. The reversal of 70985450 is 5458907.

It is a super-2 number, since 2×70985450² = 10077868223405000, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70985459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5036 + ... + 12935.

It is an arithmetic number, because the mean of its divisors is an integer number (5571320).

Almost surely, 2^70985450 is an apocalyptic number.

70985450 is a deficient number, since it is larger than the sum of its proper divisors (62726230).

70985450 is a wasteful number, since it uses less digits than its factorization.

70985450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18062 (or 18057 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 70985450 is about 8425.2863452823. The cubic root of 70985450 is about 414.0534871421.

The spelling of 70985450 in words is "seventy million, nine hundred eighty-five thousand, four hundred fifty".