28373434 has 8 divisors (see below), whose sum is σ = 42681780. Its totient is φ = 14146176.

The previous prime is 28373431. The next prime is 28373453. The reversal of 28373434 is 43437382.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24472809 + 3900625 = 4947^2 + 1975^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28373434.

It is not an unprimeable number, because it can be changed into a prime (28373431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19389 + ... + 20800.

Almost surely, 2^28373434 is an apocalyptic number.

28373434 is a deficient number, since it is larger than the sum of its proper divisors (14308346).

28373434 is a wasteful number, since it uses less digits than its factorization.

28373434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40544.

The product of its digits is 48384, while the sum is 34.

The square root of 28373434 is about 5326.6719440942. The cubic root of 28373434 is about 305.0028988348.

The spelling of 28373434 in words is "twenty-eight million, three hundred seventy-three thousand, four hundred thirty-four".