70138320 has 160 divisors (see below), whose sum is σ = 251983872. Its totient is φ = 15806976.

The previous prime is 70138307. The next prime is 70138351. The reversal of 70138320 is 2383107.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139189 + ... + 139691.

Almost surely, 2^70138320 is an apocalyptic number.

70138320 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 70138320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125991936).

70138320 is an abundant number, since it is smaller than the sum of its proper divisors (181845552).

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

70138320 is a wasteful number, since it uses less digits than its factorization.

70138320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 70138320 is about 8374.8623869291. The cubic root of 70138320 is about 412.3998067034.

The spelling of 70138320 in words is "seventy million, one hundred thirty-eight thousand, three hundred twenty".