70891968 has 56 divisors (see below), whose sum is σ = 214367872. Its totient is φ = 20254464.

The previous prime is 70891967. The next prime is 70891969. The reversal of 70891968 is 86919807.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (70891967) and next prime (70891969).

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×70891968² = 10051342253826048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70891967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25030 + ... + 27717.

Almost surely, 2^70891968 is an apocalyptic number.

It is an amenable number.

70891968 is an abundant number, since it is smaller than the sum of its proper divisors (143475904).

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

70891968 is a wasteful number, since it uses less digits than its factorization.

70891968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52769 (or 52759 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 70891968 is about 8419.7368129889. The cubic root of 70891968 is about 413.8716491662.

The spelling of 70891968 in words is "seventy million, eight hundred ninety-one thousand, nine hundred sixty-eight".