73782228 has 24 divisors (see below), whose sum is σ = 185401888. Its totient is φ = 22702176.

The previous prime is 73782221. The next prime is 73782239. The reversal of 73782228 is 82228737.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73782221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236326 + ... + 236637.

Almost surely, 2^73782228 is an apocalyptic number.

73782228 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

73782228 is an abundant number, since it is smaller than the sum of its proper divisors (111619660).

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

73782228 is a wasteful number, since it uses less digits than its factorization.

73782228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472983 (or 472981 counting only the distinct ones).

The product of its digits is 75264, while the sum is 39.

The square root of 73782228 is about 8589.6582004175. The cubic root of 73782228 is about 419.4214028299.

The spelling of 73782228 in words is "seventy-three million, seven hundred eighty-two thousand, two hundred twenty-eight".