33400818 has 48 divisors (see below), whose sum is σ = 83599776. Its totient is φ = 9525120.

The previous prime is 33400813. The next prime is 33400823. The reversal of 33400818 is 81800433.

It is an interprime number because it is at equal distance from previous prime (33400813) and next prime (33400823).

It is a super-2 number, since 2×33400818² = 2231229286138248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33400791 and 33400800.

It is not an unprimeable number, because it can be changed into a prime (33400811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1596 + ... + 8327.

It is an arithmetic number, because the mean of its divisors is an integer number (1741662).

Almost surely, 2^33400818 is an apocalyptic number.

33400818 is an abundant number, since it is smaller than the sum of its proper divisors (50198958).

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

33400818 is a wasteful number, since it uses less digits than its factorization.

33400818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9959 (or 9956 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 33400818 is about 5779.3440804299. The cubic root of 33400818 is about 322.0468342304.

The spelling of 33400818 in words is "thirty-three million, four hundred thousand, eight hundred eighteen".