33720070 has 16 divisors (see below), whose sum is σ = 63335520. Its totient is φ = 12901504.

The previous prime is 33720067. The next prime is 33720077. The reversal of 33720070 is 7002733.

It is a super-2 number, since 2×33720070² = 2274086241609800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33720077) 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, 73075 + ... + 73534.

It is an arithmetic number, because the mean of its divisors is an integer number (3958470).

Almost surely, 2^33720070 is an apocalyptic number.

33720070 is a deficient number, since it is larger than the sum of its proper divisors (29615450).

33720070 is a wasteful number, since it uses less digits than its factorization.

33720070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146639.

The product of its (nonzero) digits is 882, while the sum is 22.

The square root of 33720070 is about 5806.8984837002. The cubic root of 33720070 is about 323.0696460219.

The spelling of 33720070 in words is "thirty-three million, seven hundred twenty thousand, seventy".