28903740 has 96 divisors (see below), whose sum is σ = 87816960. Its totient is φ = 7074816.

The previous prime is 28903717. The next prime is 28903741. The reversal of 28903740 is 4730982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28903741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43531 + ... + 44189.

It is an arithmetic number, because the mean of its divisors is an integer number (914760).

Almost surely, 2^28903740 is an apocalyptic number.

28903740 is a gapful number since it is divisible by the number (20) 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 28903740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43908480).

28903740 is an abundant number, since it is smaller than the sum of its proper divisors (58913220).

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

28903740 is a wasteful number, since it uses less digits than its factorization.

28903740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 28903740 is about 5376.2198615756. The cubic root of 28903740 is about 306.8913733257.

The spelling of 28903740 in words is "twenty-eight million, nine hundred three thousand, seven hundred forty".