133373640 has 32 divisors (see below), whose sum is σ = 400121280. Its totient is φ = 35566272.

The previous prime is 133373593. The next prime is 133373671. The reversal of 133373640 is 46373331.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 133373598 and 133373607.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555604 + ... + 555843.

It is an arithmetic number, because the mean of its divisors is an integer number (12503790).

Almost surely, 2^133373640 is an apocalyptic number.

133373640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133373640 is an abundant number, since it is smaller than the sum of its proper divisors (266747640).

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

133373640 is a wasteful number, since it uses less digits than its factorization.

133373640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111461 (or 1111457 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 30.

The square root of 133373640 is about 11548.7505817729. The cubic root of 133373640 is about 510.9244287073.

The spelling of 133373640 in words is "one hundred thirty-three million, three hundred seventy-three thousand, six hundred forty".