28153340 has 12 divisors (see below), whose sum is σ = 59122056. Its totient is φ = 11261328.

The previous prime is 28153339. The next prime is 28153373. The reversal of 28153340 is 4335182.

It is a super-2 number, since 2×28153340² = 1585221106311200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 703814 + ... + 703853.

It is an arithmetic number, because the mean of its divisors is an integer number (4926838).

Almost surely, 2^28153340 is an apocalyptic number.

28153340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28153340 is an abundant number, since it is smaller than the sum of its proper divisors (30968716).

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

28153340 is a wasteful number, since it uses less digits than its factorization.

28153340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407676 (or 1407674 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 28153340 is about 5305.9721069753. The cubic root of 28153340 is about 304.2122104401.

The spelling of 28153340 in words is "twenty-eight million, one hundred fifty-three thousand, three hundred forty".