73400540 has 12 divisors (see below), whose sum is σ = 154141176. Its totient is φ = 29360208.

The previous prime is 73400533. The next prime is 73400549. The reversal of 73400540 is 4500437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73400549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1834994 + ... + 1835033.

It is an arithmetic number, because the mean of its divisors is an integer number (12845098).

Almost surely, 2^73400540 is an apocalyptic number.

It is an amenable number.

73400540 is an abundant number, since it is smaller than the sum of its proper divisors (80740636).

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

73400540 is a wasteful number, since it uses less digits than its factorization.

73400540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670036 (or 3670034 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 73400540 is about 8567.4115110691. The cubic root of 73400540 is about 418.6969060181.

Adding to 73400540 its reverse (4500437), we get a palindrome (77900977).

The spelling of 73400540 in words is "seventy-three million, four hundred thousand, five hundred forty".