33981970 has 16 divisors (see below), whose sum is σ = 66728448. Its totient is φ = 12357040.

The previous prime is 33981953. The next prime is 33981973. The reversal of 33981970 is 7918933.

It is not an unprimeable number, because it can be changed into a prime (33981973) 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, 154354 + ... + 154573.

It is an arithmetic number, because the mean of its divisors is an integer number (4170528).

Almost surely, 2^33981970 is an apocalyptic number.

33981970 is a deficient number, since it is larger than the sum of its proper divisors (32746478).

33981970 is a wasteful number, since it uses less digits than its factorization.

33981970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308945.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 33981970 is about 5829.4056300793. The cubic root of 33981970 is about 323.9039050996.

It can be divided in two parts, 339819 and 70, that added together give a square (339889 = 583²).

The spelling of 33981970 in words is "thirty-three million, nine hundred eighty-one thousand, nine hundred seventy".