28403742 has 16 divisors (see below), whose sum is σ = 56931840. Its totient is φ = 9447192.

The previous prime is 28403741. The next prime is 28403743. The reversal of 28403742 is 24730482.

It is an interprime number because it is at equal distance from previous prime (28403741) and next prime (28403743).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28403741) 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, 2068 + ... + 7815.

It is an arithmetic number, because the mean of its divisors is an integer number (3558240).

Almost surely, 2^28403742 is an apocalyptic number.

28403742 is an abundant number, since it is smaller than the sum of its proper divisors (28528098).

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

28403742 is a wasteful number, since it uses less digits than its factorization.

28403742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10367.

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 28403742 is about 5329.5161131195. The cubic root of 28403742 is about 305.1114597557. Note that the first 3 decimals are identical.

The spelling of 28403742 in words is "twenty-eight million, four hundred three thousand, seven hundred forty-two".