75381228 has 36 divisors (see below), whose sum is σ = 205205728. Its totient is φ = 23194080.

The previous prime is 75381209. The next prime is 75381253. The reversal of 75381228 is 82218357.

75381228 = T₄₇₂ + T₄₇₃ + ... + T₈₂₂.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 75381192 and 75381201.

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, 80068 + ... + 81003.

Almost surely, 2^75381228 is an apocalyptic number.

75381228 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

75381228 is an abundant number, since it is smaller than the sum of its proper divisors (129824500).

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

75381228 is a wasteful number, since it uses less digits than its factorization.

75381228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161094 (or 161089 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 75381228 is about 8682.2363478542. The cubic root of 75381228 is about 422.4296590529.

The spelling of 75381228 in words is "seventy-five million, three hundred eighty-one thousand, two hundred twenty-eight".