70320400 has 120 divisors (see below), whose sum is σ = 179345664. Its totient is φ = 26457600.

The previous prime is 70320379. The next prime is 70320421. The reversal of 70320400 is 402307.

It is an interprime number because it is at equal distance from previous prime (70320379) and next prime (70320421).

It is a super-4 number, since 4×70320400⁴ (a number of 32 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 657147 + ... + 657253.

Almost surely, 2^70320400 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 70320400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89672832).

70320400 is an abundant number, since it is smaller than the sum of its proper divisors (109025264).

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

70320400 is a wasteful number, since it uses less digits than its factorization.

70320400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 70320400 is about 8385.7259673805. The cubic root of 70320400 is about 412.7563634442.

Adding to 70320400 its reverse (402307), we get a palindrome (70722707).

The spelling of 70320400 in words is "seventy million, three hundred twenty thousand, four hundred".