31450428 has 36 divisors (see below), whose sum is σ = 79742208. Its totient is φ = 10451520.

The previous prime is 31450427. The next prime is 31450429. The reversal of 31450428 is 82405413.

It is an interprime number because it is at equal distance from previous prime (31450427) and next prime (31450429).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31450421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12648 + ... + 14928.

Almost surely, 2^31450428 is an apocalyptic number.

It is an amenable number.

31450428 is an abundant number, since it is smaller than the sum of its proper divisors (48291780).

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

31450428 is a wasteful number, since it uses less digits than its factorization.

31450428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2674 (or 2669 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 31450428 is about 5608.0681165621. The cubic root of 31450428 is about 315.6522238126.

It can be divided in two parts, 31450 and 428, that added together give a triangular number (31878 = T₂₅₂).

The spelling of 31450428 in words is "thirty-one million, four hundred fifty thousand, four hundred twenty-eight".