32991642 has 24 divisors (see below), whose sum is σ = 73415316. Its totient is φ = 10699776.

The previous prime is 32991617. The next prime is 32991643. The reversal of 32991642 is 24619923.

32991642 is a `hidden beast` number, since 3 + 2 + 9 + 9 + 1 + 642 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 31573161 + 1418481 = 5619^2 + 1191^2 .

It is a junction number, because it is equal to n+sod(n) for n = 32991597 and 32991606.

It is not an unprimeable number, because it can be changed into a prime (32991643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24103 + ... + 25434.

Almost surely, 2^32991642 is an apocalyptic number.

32991642 is an abundant number, since it is smaller than the sum of its proper divisors (40423674).

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

32991642 is a wasteful number, since it uses less digits than its factorization.

32991642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49582 (or 49579 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 32991642 is about 5743.8351299458. The cubic root of 32991642 is about 320.7263513475.

It can be divided in two parts, 32991 and 642, that added together give a palindrome (33633).

The spelling of 32991642 in words is "thirty-two million, nine hundred ninety-one thousand, six hundred forty-two".