7140631820 has 72 divisors (see below), whose sum is σ = 17489319120. Its totient is φ = 2441792640.

The previous prime is 7140631811. The next prime is 7140631831. The reversal of 7140631820 is 281360417.

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, 371855 + ... + 390585.

It is an arithmetic number, because the mean of its divisors is an integer number (242907210).

Almost surely, 2^7140631820 is an apocalyptic number.

7140631820 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 7140631820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8744659560).

7140631820 is an abundant number, since it is smaller than the sum of its proper divisors (10348687300).

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

7140631820 is a wasteful number, since it uses less digits than its factorization.

7140631820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19143 (or 19134 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 7140631820 is about 84502.2592597381. The cubic root of 7140631820 is about 1925.6567676354.

The spelling of 7140631820 in words is "seven billion, one hundred forty million, six hundred thirty-one thousand, eight hundred twenty".