33640998 has 8 divisors (see below), whose sum is σ = 67282008. Its totient is φ = 11213664.

The previous prime is 33640993. The next prime is 33641051. The reversal of 33640998 is 89904633.

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

33640998 is an admirable number.

It is a super-2 number, since 2×33640998² = 2263433492872008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33640993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2803411 + ... + 2803422.

It is an arithmetic number, because the mean of its divisors is an integer number (8410251).

Almost surely, 2^33640998 is an apocalyptic number.

33640998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

33640998 is a wasteful number, since it uses less digits than its factorization.

33640998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5606838.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 33640998 is about 5800.0860338447. The cubic root of 33640998 is about 322.8169205978.

The spelling of 33640998 in words is "thirty-three million, six hundred forty thousand, nine hundred ninety-eight".