40072550 has 24 divisors (see below), whose sum is σ = 85183536. Its totient is φ = 13739040.

The previous prime is 40072493. The next prime is 40072559. The reversal of 40072550 is 5527004.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40072559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56897 + ... + 57596.

It is an arithmetic number, because the mean of its divisors is an integer number (3549314).

Almost surely, 2^40072550 is an apocalyptic number.

40072550 is an abundant number, since it is smaller than the sum of its proper divisors (45110986).

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

40072550 is a wasteful number, since it uses less digits than its factorization.

40072550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114512 (or 114507 counting only the distinct ones).

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

The square root of 40072550 is about 6330.2883030712. The cubic root of 40072550 is about 342.2018290463.

Adding to 40072550 its reverse (5527004), we get a palindrome (45599554).

The spelling of 40072550 in words is "forty million, seventy-two thousand, five hundred fifty".