70884138 has 16 divisors (see below), whose sum is σ = 152673696. Its totient is φ = 21810480.

The previous prime is 70884133. The next prime is 70884181. The reversal of 70884138 is 83148807.

It is a super-2 number, since 2×70884138² = 10049122040006088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 70884096 and 70884105.

It is not an unprimeable number, because it can be changed into a prime (70884133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454308 + ... + 454463.

It is an arithmetic number, because the mean of its divisors is an integer number (9542106).

Almost surely, 2^70884138 is an apocalyptic number.

70884138 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

70884138 is an abundant number, since it is smaller than the sum of its proper divisors (81789558).

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

70884138 is a wasteful number, since it uses less digits than its factorization.

70884138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908789.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 70884138 is about 8419.2718212444. The cubic root of 70884138 is about 413.8564112654.

The spelling of 70884138 in words is "seventy million, eight hundred eighty-four thousand, one hundred thirty-eight".