31428422 has 8 divisors (see below), whose sum is σ = 47191872. Its totient is φ = 15697800.

The previous prime is 31428409. The next prime is 31428433. The reversal of 31428422 is 22482413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 31428391 and 31428400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5654 + ... + 9737.

It is an arithmetic number, because the mean of its divisors is an integer number (5898984).

Almost surely, 2^31428422 is an apocalyptic number.

31428422 is a deficient number, since it is larger than the sum of its proper divisors (15763450).

31428422 is a wasteful number, since it uses less digits than its factorization.

31428422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16414.

The product of its digits is 3072, while the sum is 26.

The square root of 31428422 is about 5606.1057785240. The cubic root of 31428422 is about 315.5785855612.

The spelling of 31428422 in words is "thirty-one million, four hundred twenty-eight thousand, four hundred twenty-two".