1540998 has 16 divisors (see below), whose sum is σ = 3424560. Its totient is φ = 513648.

The previous prime is 1540997. The next prime is 1541003. The reversal of 1540998 is 8990451.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14215 + ... + 14322.

It is an arithmetic number, because the mean of its divisors is an integer number (214035).

2^1540998 is an apocalyptic number.

1540998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1540998 is an abundant number, since it is smaller than the sum of its proper divisors (1883562).

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

1540998 is a wasteful number, since it uses less digits than its factorization.

1540998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28548 (or 28542 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1540998 is about 1241.3694051329. The cubic root of 1540998 is about 115.5049753296.

The spelling of 1540998 in words is "one million, five hundred forty thousand, nine hundred ninety-eight".