70401680 has 20 divisors (see below), whose sum is σ = 163684092. Its totient is φ = 28160640.

The previous prime is 70401677. The next prime is 70401701. The reversal of 70401680 is 8610407.

It can be written as a sum of positive squares in 2 ways, for example, as 28047616 + 42354064 = 5296^2 + 6508^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439931 + ... + 440090.

Almost surely, 2^70401680 is an apocalyptic number.

It is an amenable number.

70401680 is an abundant number, since it is smaller than the sum of its proper divisors (93282412).

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

70401680 is a wasteful number, since it uses less digits than its factorization.

70401680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880034 (or 880028 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 70401680 is about 8390.5708983358. The cubic root of 70401680 is about 412.9153306841.

The spelling of 70401680 in words is "seventy million, four hundred one thousand, six hundred eighty".