73142240 has 24 divisors (see below), whose sum is σ = 172798920. Its totient is φ = 29256832.

The previous prime is 73142239. The next prime is 73142273. The reversal of 73142240 is 4224137.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228410 + ... + 228729.

It is an arithmetic number, because the mean of its divisors is an integer number (7199955).

Almost surely, 2^73142240 is an apocalyptic number.

It is an amenable number.

73142240 is an abundant number, since it is smaller than the sum of its proper divisors (99656680).

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

73142240 is a wasteful number, since it uses less digits than its factorization.

73142240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457154 (or 457146 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 73142240 is about 8552.3236608538. The cubic root of 73142240 is about 418.2051906511.

Adding to 73142240 its reverse (4224137), we get a palindrome (77366377).

The spelling of 73142240 in words is "seventy-three million, one hundred forty-two thousand, two hundred forty".