31463730 has 48 divisors (see below), whose sum is σ = 82943640. Its totient is φ = 8273664.

The previous prime is 31463717. The next prime is 31463743. The reversal of 31463730 is 3736413.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31463717) and next prime (31463743).

It can be written as a sum of positive squares in 4 ways, for example, as 18740241 + 12723489 = 4329^2 + 3567^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31463694 and 31463703.

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, 4176 + ... + 8964.

Almost surely, 2^31463730 is an apocalyptic number.

31463730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31463730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41471820).

31463730 is an abundant number, since it is smaller than the sum of its proper divisors (51479910).

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

31463730 is a wasteful number, since it uses less digits than its factorization.

31463730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4875 (or 4872 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 31463730 is about 5609.2539610897. The cubic root of 31463730 is about 315.6967193815.

It can be divided in two parts, 31 and 463730, that added together give a square (463761 = 681²).

The spelling of 31463730 in words is "thirty-one million, four hundred sixty-three thousand, seven hundred thirty".