33401387 has 4 divisors (see below), whose sum is σ = 33419400. Its totient is φ = 33383376.

The previous prime is 33401363. The next prime is 33401393. The reversal of 33401387 is 78310433.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 33401387 - 2⁸ = 33401131 is a prime.

It is a super-2 number, since 2×33401387² = 2231305307047538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33401317) 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, 5858 + ... + 10055.

It is an arithmetic number, because the mean of its divisors is an integer number (8354850).

Almost surely, 2^33401387 is an apocalyptic number.

33401387 is a deficient number, since it is larger than the sum of its proper divisors (18013).

33401387 is a wasteful number, since it uses less digits than its factorization.

33401387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18012.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 33401387 is about 5779.3933072599. The cubic root of 33401387 is about 322.0486629641.

The spelling of 33401387 in words is "thirty-three million, four hundred one thousand, three hundred eighty-seven".