133372728 has 48 divisors (see below), whose sum is σ = 362161800. Its totient is φ = 44341440.

The previous prime is 133372717. The next prime is 133372739. The reversal of 133372728 is 827273331.

It is an interprime number because it is at equal distance from previous prime (133372717) and next prime (133372739).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 133372692 and 133372701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27958 + ... + 32378.

Almost surely, 2^133372728 is an apocalyptic number.

133372728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

133372728 is an abundant number, since it is smaller than the sum of its proper divisors (228789072).

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

133372728 is a wasteful number, since it uses less digits than its factorization.

133372728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4852 (or 4845 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 133372728 is about 11548.7110969147. The cubic root of 133372728 is about 510.9232641490.

The spelling of 133372728 in words is "one hundred thirty-three million, three hundred seventy-two thousand, seven hundred twenty-eight".