28740348 has 144 divisors (see below), whose sum is σ = 92624896. Its totient is φ = 7309440.

The previous prime is 28740337. The next prime is 28740389. The reversal of 28740348 is 84304782.

It is a super-2 number, since 2×28740348² = 1652015206322208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 101415 + ... + 101697.

Almost surely, 2^28740348 is an apocalyptic number.

28740348 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28740348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46312448).

28740348 is an abundant number, since it is smaller than the sum of its proper divisors (63884548).

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

28740348 is a wasteful number, since it uses less digits than its factorization.

28740348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 28740348 is about 5361.0025181863. The cubic root of 28740348 is about 306.3119975552.

The spelling of 28740348 in words is "twenty-eight million, seven hundred forty thousand, three hundred forty-eight".