7631940 has 48 divisors (see below), whose sum is σ = 21490560. Its totient is φ = 2023680.

The previous prime is 7631917. The next prime is 7631951. The reversal of 7631940 is 491367.

It is a happy number.

It is a super-3 number, since 3×7631940³ (a number of 22 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 7631898 and 7631907.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18456 + ... + 18864.

It is an arithmetic number, because the mean of its divisors is an integer number (447720).

Almost surely, 2^7631940 is an apocalyptic number.

It is an amenable number.

7631940 is an abundant number, since it is smaller than the sum of its proper divisors (13858620).

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

7631940 is a wasteful number, since it uses less digits than its factorization.

7631940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 7631940 is about 2762.5966046457. The cubic root of 7631940 is about 196.8845553437.

The spelling of 7631940 in words is "seven million, six hundred thirty-one thousand, nine hundred forty".