70988820 has 96 divisors (see below), whose sum is σ = 228711168. Its totient is φ = 16115712.

The previous prime is 70988789. The next prime is 70988837. The reversal of 70988820 is 2888907.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72172 + ... + 73148.

It is an arithmetic number, because the mean of its divisors is an integer number (2382408).

Almost surely, 2^70988820 is an apocalyptic number.

70988820 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 70988820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114355584).

70988820 is an abundant number, since it is smaller than the sum of its proper divisors (157722348).

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

70988820 is a wasteful number, since it uses less digits than its factorization.

70988820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169 (or 1167 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 70988820 is about 8425.4863361114. The cubic root of 70988820 is about 414.0600393683.

The spelling of 70988820 in words is "seventy million, nine hundred eighty-eight thousand, eight hundred twenty".