31473120 has 384 divisors, whose sum is σ = 130636800. Its totient is φ = 6193152.

The previous prime is 31473109. The next prime is 31473151. The reversal of 31473120 is 2137413.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1085266 + ... + 1085294.

It is an arithmetic number, because the mean of its divisors is an integer number (340200).

Almost surely, 2^31473120 is an apocalyptic number.

31473120 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 31473120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65318400).

31473120 is an abundant number, since it is smaller than the sum of its proper divisors (99163680).

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

31473120 is a wasteful number, since it uses less digits than its factorization.

31473120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 31473120 is about 5610.0909083543. The cubic root of 31473120 is about 315.7281216485.

The spelling of 31473120 in words is "thirty-one million, four hundred seventy-three thousand, one hundred twenty".