70231840 has 96 divisors (see below), whose sum is σ = 192447360. Its totient is φ = 23721984.

The previous prime is 70231831. The next prime is 70231841. The reversal of 70231840 is 4813207.

It is a super-2 number, since 2×70231840² = 9865022699571200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70231841) 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, 81331 + ... + 82189.

It is an arithmetic number, because the mean of its divisors is an integer number (2004660).

Almost surely, 2^70231840 is an apocalyptic number.

70231840 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 70231840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96223680).

70231840 is an abundant number, since it is smaller than the sum of its proper divisors (122215520).

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

70231840 is a wasteful number, since it uses less digits than its factorization.

70231840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954 (or 946 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 70231840 is about 8380.4439023240. The cubic root of 70231840 is about 412.5830184913.

The spelling of 70231840 in words is "seventy million, two hundred thirty-one thousand, eight hundred forty".