28742148 has 48 divisors (see below), whose sum is σ = 76345920. Its totient is φ = 9345600.

The previous prime is 28742137. The next prime is 28742173. The reversal of 28742148 is 84124782.

It is a super-2 number, since 2×28742148² = 1652222143307808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1183 + ... + 7673.

It is an arithmetic number, because the mean of its divisors is an integer number (1590540).

Almost surely, 2^28742148 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28742148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38172960).

28742148 is an abundant number, since it is smaller than the sum of its proper divisors (47603772).

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

28742148 is a wasteful number, since it uses less digits than its factorization.

28742148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6545 (or 6537 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 28742148 is about 5361.1703946060. The cubic root of 28742148 is about 306.3183921668.

The spelling of 28742148 in words is "twenty-eight million, seven hundred forty-two thousand, one hundred forty-eight".