7280463640 has 32 divisors (see below), whose sum is σ = 16383724560. Its totient is φ = 2911708800.

The previous prime is 7280463587. The next prime is 7280463647. The reversal of 7280463640 is 463640827.

It is a happy number.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 7280463593 and 7280463602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7280463647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332635 + ... + 353845.

Almost surely, 2^7280463640 is an apocalyptic number.

It is an amenable number.

7280463640 is an abundant number, since it is smaller than the sum of its proper divisors (9103260920).

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

7280463640 is a wasteful number, since it uses less digits than its factorization.

7280463640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29803 (or 29799 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 7280463640 is about 85325.6329598556. The cubic root of 7280463640 is about 1938.1453597070.

The spelling of 7280463640 in words is "seven billion, two hundred eighty million, four hundred sixty-three thousand, six hundred forty".