28263070 has 32 divisors (see below), whose sum is σ = 58423680. Its totient is φ = 9735840.

The previous prime is 28263049. The next prime is 28263071. The reversal of 28263070 is 7036282.

It is a super-2 number, since 2×28263070² = 1597602251649800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28263071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4672 + ... + 8851.

It is an arithmetic number, because the mean of its divisors is an integer number (1825740).

Almost surely, 2^28263070 is an apocalyptic number.

28263070 is an abundant number, since it is smaller than the sum of its proper divisors (30160610).

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

28263070 is a wasteful number, since it uses less digits than its factorization.

28263070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13560.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 28263070 is about 5316.3022863641. The cubic root of 28263070 is about 304.6069289215.

The spelling of 28263070 in words is "twenty-eight million, two hundred sixty-three thousand, seventy".