70424640 has 560 divisors, whose sum is σ = 309798720. Its totient is φ = 14929920.

The previous prime is 70424623. The next prime is 70424657. The reversal of 70424640 is 4642407.

It is an interprime number because it is at equal distance from previous prime (70424623) and next prime (70424657).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3706551 + ... + 3706569.

It is an arithmetic number, because the mean of its divisors is an integer number (553212).

Almost surely, 2^70424640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70424640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154899360).

70424640 is an abundant number, since it is smaller than the sum of its proper divisors (239374080).

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

70424640 is a wasteful number, since it uses less digits than its factorization.

70424640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 70424640 is about 8391.9389892920. The cubic root of 70424640 is about 412.9602136355.

The spelling of 70424640 in words is "seventy million, four hundred twenty-four thousand, six hundred forty".