28619400 has 48 divisors (see below), whose sum is σ = 88722000. Its totient is φ = 7631680.

The previous prime is 28619399. The next prime is 28619401. The reversal of 28619400 is 491682.

It is an interprime number because it is at equal distance from previous prime (28619399) and next prime (28619401).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (28619401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23250 + ... + 24449.

It is an arithmetic number, because the mean of its divisors is an integer number (1848375).

Almost surely, 2^28619400 is an apocalyptic number.

28619400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28619400 is an abundant number, since it is smaller than the sum of its proper divisors (60102600).

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

28619400 is a wasteful number, since it uses less digits than its factorization.

28619400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47718 (or 47709 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 28619400 is about 5349.7102725288. The cubic root of 28619400 is about 305.8817091586.

The spelling of 28619400 in words is "twenty-eight million, six hundred nineteen thousand, four hundred".