1491395200 has 48 divisors (see below), whose sum is σ = 3684220110. Its totient is φ = 596556800.

The previous prime is 1491395197. The next prime is 1491395203. The reversal of 1491395200 is 25931941.

It is an interprime number because it is at equal distance from previous prime (1491395197) and next prime (1491395203).

It can be written as a sum of positive squares in 3 ways, for example, as 1330206784 + 161188416 = 36472^2 + 12696^2 .

It is not an unprimeable number, because it can be changed into a prime (1491395203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 229831 + ... + 236230.

Almost surely, 2^1491395200 is an apocalyptic number.

1491395200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1491395200 is an abundant number, since it is smaller than the sum of its proper divisors (2192824910).

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

1491395200 is an equidigital number, since it uses as much as digits as its factorization.

1491395200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466085 (or 466068 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1491395200 is about 38618.5861988758. The cubic root of 1491395200 is about 1142.5211464659.

The spelling of 1491395200 in words is "one billion, four hundred ninety-one million, three hundred ninety-five thousand, two hundred".