7280812 has 54 divisors (see below), whose sum is σ = 16344636. Its totient is φ = 2827440.

The previous prime is 7280809. The next prime is 7280831. The reversal of 7280812 is 2180827.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23563 + ... + 23869.

Almost surely, 2^7280812 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 7280812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8172318).

7280812 is an abundant number, since it is smaller than the sum of its proper divisors (9063824).

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

7280812 is a wasteful number, since it uses less digits than its factorization.

7280812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 7280812 is about 2698.2979820620. The cubic root of 7280812 is about 193.8176271729.

Subtracting from 7280812 its product of nonzero digits (1792), we obtain a triangular number (7279020 = T₃₈₁₅).

The spelling of 7280812 in words is "seven million, two hundred eighty thousand, eight hundred twelve".