28737373 has 24 divisors (see below), whose sum is σ = 35754048. Its totient is φ = 22974336.

The previous prime is 28737353. The next prime is 28737421. The reversal of 28737373 is 37373782.

It is not a de Polignac number, because 28737373 - 2⁹ = 28736861 is a prime.

It is a super-2 number, since 2×28737373² = 1651673213882258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28737323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48165 + ... + 48757.

It is an arithmetic number, because the mean of its divisors is an integer number (1489752).

Almost surely, 2^28737373 is an apocalyptic number.

28737373 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28737373 is a deficient number, since it is larger than the sum of its proper divisors (7016675).

28737373 is a wasteful number, since it uses less digits than its factorization.

28737373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673 (or 666 counting only the distinct ones).

The product of its digits is 148176, while the sum is 40.

The square root of 28737373 is about 5360.7250442454. The cubic root of 28737373 is about 306.3014280980.

The spelling of 28737373 in words is "twenty-eight million, seven hundred thirty-seven thousand, three hundred seventy-three".