31372380 has 192 divisors, whose sum is σ = 108662400. Its totient is φ = 7464960.

The previous prime is 31372373. The next prime is 31372387. The reversal of 31372380 is 8327313.

It is an interprime number because it is at equal distance from previous prime (31372373) and next prime (31372387).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31372387) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 287766 + ... + 287874.

It is an arithmetic number, because the mean of its divisors is an integer number (565950).

Almost surely, 2^31372380 is an apocalyptic number.

31372380 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 31372380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54331200).

31372380 is an abundant number, since it is smaller than the sum of its proper divisors (77290020).

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

31372380 is a wasteful number, since it uses less digits than its factorization.

31372380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 31372380 is about 5601.1052480738. The cubic root of 31372380 is about 315.3908979361.

Adding to 31372380 its reverse (8327313), we get a palindrome (39699693).

The spelling of 31372380 in words is "thirty-one million, three hundred seventy-two thousand, three hundred eighty".