28623319 has 8 divisors (see below), whose sum is σ = 30114000. Its totient is φ = 27166272.

The previous prime is 28623313. The next prime is 28623341. The reversal of 28623319 is 91332682.

It is a happy number.

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

It is not a de Polignac number, because 28623319 - 2¹³ = 28615127 is a prime.

It is a super-2 number, since 2×28623319² = 1638588781151522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28623313) 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, 6654 + ... + 10075.

It is an arithmetic number, because the mean of its divisors is an integer number (3764250).

Almost surely, 2^28623319 is an apocalyptic number.

28623319 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28623319 is a deficient number, since it is larger than the sum of its proper divisors (1490681).

28623319 is a wasteful number, since it uses less digits than its factorization.

28623319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16817.

The product of its digits is 15552, while the sum is 34.

The square root of 28623319 is about 5350.0765415085. The cubic root of 28623319 is about 305.8956705008.

The spelling of 28623319 in words is "twenty-eight million, six hundred twenty-three thousand, three hundred nineteen".