1449169890 has 64 divisors (see below), whose sum is σ = 3985009920. Its totient is φ = 330393600.

The previous prime is 1449169889. The next prime is 1449169903. The reversal of 1449169890 is 989619441.

It is a super-2 number, since 2×1449169890² = 4200186740165224200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75606 + ... + 92814.

It is an arithmetic number, because the mean of its divisors is an integer number (62265780).

Almost surely, 2^1449169890 is an apocalyptic number.

1449169890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1449169890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1992504960).

1449169890 is an abundant number, since it is smaller than the sum of its proper divisors (2535840030).

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

1449169890 is a wasteful number, since it uses less digits than its factorization.

1449169890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17627.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 1449169890 is about 38067.9640905578. The cubic root of 1449169890 is about 1131.6351636987.

The spelling of 1449169890 in words is "one billion, four hundred forty-nine million, one hundred sixty-nine thousand, eight hundred ninety".