70400008 has 64 divisors (see below), whose sum is σ = 157593600. Its totient is φ = 28848960.

The previous prime is 70400003. The next prime is 70400027. The reversal of 70400008 is 80000407.

It is a happy number.

It is a super-2 number, since 2×70400008² = 9912322252800128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (70400003) 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, 185563 + ... + 185941.

It is an arithmetic number, because the mean of its divisors is an integer number (2462400).

Almost surely, 2^70400008 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 70400008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78796800).

70400008 is an abundant number, since it is smaller than the sum of its proper divisors (87193592).

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

70400008 is a wasteful number, since it uses less digits than its factorization.

70400008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 70400008 is about 8390.4712620925. The cubic root of 70400008 is about 412.9120618232.

The spelling of 70400008 in words is "seventy million, four hundred thousand, eight".