70402640 has 120 divisors (see below), whose sum is σ = 205820160. Its totient is φ = 21922560.

The previous prime is 70402621. The next prime is 70402679. The reversal of 70402640 is 4620407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67241 + ... + 68279.

It is an arithmetic number, because the mean of its divisors is an integer number (1715168).

Almost surely, 2^70402640 is an apocalyptic number.

70402640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70402640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102910080).

70402640 is an abundant number, since it is smaller than the sum of its proper divisors (135417520).

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

70402640 is a wasteful number, since it uses less digits than its factorization.

70402640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081 (or 1064 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 70402640 is about 8390.6281052136. The cubic root of 70402640 is about 412.9172075186.

The spelling of 70402640 in words is "seventy million, four hundred two thousand, six hundred forty".