331906740 has 96 divisors (see below), whose sum is σ = 1048844160. Its totient is φ = 77683200.

The previous prime is 331906699. The next prime is 331906777. The reversal of 331906740 is 47609133.

It is a super-2 number, since 2×331906740² = 220324168114855200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10470 + ... + 27810.

It is an arithmetic number, because the mean of its divisors is an integer number (10925460).

Almost surely, 2^331906740 is an apocalyptic number.

331906740 is a gapful number since it is divisible by the number (30) 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 331906740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (524422080).

331906740 is an abundant number, since it is smaller than the sum of its proper divisors (716937420).

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

331906740 is a wasteful number, since it uses less digits than its factorization.

331906740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17393 (or 17391 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 331906740 is about 18218.3078248228. The cubic root of 331906740 is about 692.3707153073.

The spelling of 331906740 in words is "three hundred thirty-one million, nine hundred six thousand, seven hundred forty".