28743402 has 32 divisors (see below), whose sum is σ = 58908672. Its totient is φ = 9347184.

The previous prime is 28743401. The next prime is 28743467. The reversal of 28743402 is 20434782.

It is a super-3 number, since 3×28743402³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28743402.

It is not an unprimeable number, because it can be changed into a prime (28743401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50773 + ... + 51335.

It is an arithmetic number, because the mean of its divisors is an integer number (1840896).

Almost surely, 2^28743402 is an apocalyptic number.

28743402 is an abundant number, since it is smaller than the sum of its proper divisors (30165270).

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

28743402 is a wasteful number, since it uses less digits than its factorization.

28743402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762.

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

The square root of 28743402 is about 5361.2873454050. The cubic root of 28743402 is about 306.3228469217.

The spelling of 28743402 in words is "twenty-eight million, seven hundred forty-three thousand, four hundred two".