28653040 has 40 divisors (see below), whose sum is σ = 71745408. Its totient is φ = 10579200.

The previous prime is 28653029. The next prime is 28653049. The reversal of 28653040 is 4035682.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28653049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12736 + ... + 14815.

Almost surely, 2^28653040 is an apocalyptic number.

28653040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28653040 is an abundant number, since it is smaller than the sum of its proper divisors (43092368).

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

28653040 is a wasteful number, since it uses less digits than its factorization.

28653040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27577 (or 27571 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 28653040 is about 5352.8534446592. The cubic root of 28653040 is about 306.0015093835.

The spelling of 28653040 in words is "twenty-eight million, six hundred fifty-three thousand, forty".