33540690 has 16 divisors (see below), whose sum is σ = 80497728. Its totient is φ = 8944176.

The previous prime is 33540659. The next prime is 33540691. The reversal of 33540690 is 9604533.

It is a happy number.

It is a super-2 number, since 2×33540690² = 2249955771352200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1118023 = 33540690 / (3 + 3 + 5 + 4 + 0 + 6 + 9 + 0).

It is not an unprimeable number, because it can be changed into a prime (33540691) 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, 558982 + ... + 559041.

It is an arithmetic number, because the mean of its divisors is an integer number (5031108).

Almost surely, 2^33540690 is an apocalyptic number.

33540690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

33540690 is an abundant number, since it is smaller than the sum of its proper divisors (46957038).

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

33540690 is a wasteful number, since it uses less digits than its factorization.

33540690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118033.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 33540690 is about 5791.4324652887. The cubic root of 33540690 is about 322.4957514013.

The spelling of 33540690 in words is "thirty-three million, five hundred forty thousand, six hundred ninety".