72453450 has 48 divisors (see below), whose sum is σ = 187505856. Its totient is φ = 18480000.

The previous prime is 72453413. The next prime is 72453463. The reversal of 72453450 is 5435427.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 7051 + ... + 13950.

It is an arithmetic number, because the mean of its divisors is an integer number (3906372).

Almost surely, 2^72453450 is an apocalyptic number.

72453450 is an abundant number, since it is smaller than the sum of its proper divisors (115052406).

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

72453450 is a wasteful number, since it uses less digits than its factorization.

72453450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21039 (or 21034 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 72453450 is about 8511.9592339249. The cubic root of 72453450 is about 416.8882838828. Note that the first 3 decimals are identical.

Adding to 72453450 its reverse (5435427), we get a palindrome (77888877).

The spelling of 72453450 in words is "seventy-two million, four hundred fifty-three thousand, four hundred fifty".