1403995680 has 168 divisors, whose sum is σ = 4973547852. Its totient is φ = 374367744.

The previous prime is 1403995679. The next prime is 1403995687. The reversal of 1403995680 is 865993041.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1172103696 + 231891984 = 34236^2 + 15228^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1403995687) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 110622 + ... + 122658.

Almost surely, 2^1403995680 is an apocalyptic number.

1403995680 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 1403995680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2486773926).

1403995680 is an abundant number, since it is smaller than the sum of its proper divisors (3569552172).

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

1403995680 is an equidigital number, since it uses as much as digits as its factorization.

1403995680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12070 (or 12047 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 1403995680 is about 37469.9303442107. The cubic root of 1403995680 is about 1119.7521985790.

The spelling of 1403995680 in words is "one billion, four hundred three million, nine hundred ninety-five thousand, six hundred eighty".