31459428 has 240 divisors, whose sum is σ = 111560064. Its totient is φ = 7464960.

The previous prime is 31459409. The next prime is 31459433. The reversal of 31459428 is 82495413.

It is a super-2 number, since 2×31459428² = 1979391220174368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (34560) is a multiple of the sum of its prime factors (144).

It is a junction number, because it is equal to n+sod(n) for n = 31459392 and 31459401.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 324276 + ... + 324372.

Almost surely, 2^31459428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31459428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55780032).

31459428 is an abundant number, since it is smaller than the sum of its proper divisors (80100636).

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

31459428 is a wasteful number, since it uses less digits than its factorization.

31459428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 133 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 31459428 is about 5608.8704745252. The cubic root of 31459428 is about 315.6823304413.

The spelling of 31459428 in words is "thirty-one million, four hundred fifty-nine thousand, four hundred twenty-eight".