72040550 has 12 divisors (see below), whose sum is σ = 133995516. Its totient is φ = 28816200.

The previous prime is 72040547. The next prime is 72040583. The reversal of 72040550 is 5504027.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 720356 + ... + 720455.

It is an arithmetic number, because the mean of its divisors is an integer number (11166293).

Almost surely, 2^72040550 is an apocalyptic number.

72040550 is a deficient number, since it is larger than the sum of its proper divisors (61954966).

72040550 is a wasteful number, since it uses less digits than its factorization.

72040550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440823 (or 1440818 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 72040550 is about 8487.6704695694. The cubic root of 72040550 is about 416.0948493968.

Adding to 72040550 its reverse (5504027), we get a palindrome (77544577).

The spelling of 72040550 in words is "seventy-two million, forty thousand, five hundred fifty".