73420138 has 12 divisors (see below), whose sum is σ = 121052610. Its totient is φ = 33372680.

The previous prime is 73420079. The next prime is 73420147. The reversal of 73420138 is 83102437.

It can be written as a sum of positive squares in only one way, i.e., 60481729 + 12938409 = 7777^2 + 3597^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151453 + ... + 151936.

Almost surely, 2^73420138 is an apocalyptic number.

73420138 is a deficient number, since it is larger than the sum of its proper divisors (47632472).

73420138 is a wasteful number, since it uses less digits than its factorization.

73420138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303413 (or 303402 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 73420138 is about 8568.5551874280. Note that the first 3 decimals coincide. The cubic root of 73420138 is about 418.7341668328.

The spelling of 73420138 in words is "seventy-three million, four hundred twenty thousand, one hundred thirty-eight".