31402842 has 16 divisors (see below), whose sum is σ = 66500352. Its totient is φ = 9851840.

The previous prime is 31402841. The next prime is 31402867. The reversal of 31402842 is 24820413.

It is a super-2 number, since 2×31402842² = 1972276971353928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31402841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153834 + ... + 154037.

It is an arithmetic number, because the mean of its divisors is an integer number (4156272).

Almost surely, 2^31402842 is an apocalyptic number.

31402842 is an abundant number, since it is smaller than the sum of its proper divisors (35097510).

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

31402842 is a wasteful number, since it uses less digits than its factorization.

31402842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307893.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 31402842 is about 5603.8238730353. The cubic root of 31402842 is about 315.4929444886.

The spelling of 31402842 in words is "thirty-one million, four hundred two thousand, eight hundred forty-two".