28951470 has 48 divisors (see below), whose sum is σ = 77034672. Its totient is φ = 7539840.

The previous prime is 28951469. The next prime is 28951471. The reversal of 28951470 is 7415982.

It is an interprime number because it is at equal distance from previous prime (28951469) and next prime (28951471).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28951471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130 + ... + 7610.

It is an arithmetic number, because the mean of its divisors is an integer number (1604889).

Almost surely, 2^28951470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28951470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38517336).

28951470 is an abundant number, since it is smaller than the sum of its proper divisors (48083202).

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

28951470 is a wasteful number, since it uses less digits than its factorization.

28951470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7537 (or 7534 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 28951470 is about 5380.6570230781. The cubic root of 28951470 is about 307.0602081053.

The spelling of 28951470 in words is "twenty-eight million, nine hundred fifty-one thousand, four hundred seventy".