1479257640 has 224 divisors, whose sum is σ = 5703886080. Its totient is φ = 338069376.

The previous prime is 1479257629. The next prime is 1479257651. The reversal of 1479257640 is 467529741.

1479257640 is a `hidden beast` number, since 1 + 4 + 79 + 2 + 576 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1479257629) and next prime (1479257651).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 200497 + ... + 207743.

Almost surely, 2^1479257640 is an apocalyptic number.

1479257640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1479257640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2851943040).

1479257640 is an abundant number, since it is smaller than the sum of its proper divisors (4224628440).

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

1479257640 is an equidigital number, since it uses as much as digits as its factorization.

1479257640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7283 (or 7264 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 1479257640 is about 38461.1185484770. The cubic root of 1479257640 is about 1139.4132714850.

The spelling of 1479257640 in words is "one billion, four hundred seventy-nine million, two hundred fifty-seven thousand, six hundred forty".