70684440 has 64 divisors (see below), whose sum is σ = 214984800. Its totient is φ = 18588672.

The previous prime is 70684399. The next prime is 70684441. The reversal of 70684440 is 4448607.

It is a super-2 number, since 2×70684440² = 9992580116227200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70684441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4726 + ... + 12794.

Almost surely, 2^70684440 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 70684440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107492400).

70684440 is an abundant number, since it is smaller than the sum of its proper divisors (144300360).

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

70684440 is a wasteful number, since it uses less digits than its factorization.

70684440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8156 (or 8152 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 70684440 is about 8407.4038799144. The cubic root of 70684440 is about 413.4674007229.

The spelling of 70684440 in words is "seventy million, six hundred eighty-four thousand, four hundred forty".