545742990 has 96 divisors (see below), whose sum is σ = 1538330976. Its totient is φ = 133436160.

The previous prime is 545742949. The next prime is 545743001. The reversal of 545742990 is 99247545.

545742990 is a `hidden beast` number, since 54 + 574 + 29 + 9 + 0 = 666.

It is a super-2 number, since 2×545742990² = 595670822268280200, which contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 182205 + ... + 185175.

It is an arithmetic number, because the mean of its divisors is an integer number (16024281).

Almost surely, 2^545742990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 545742990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769165488).

545742990 is an abundant number, since it is smaller than the sum of its proper divisors (992587986).

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

545742990 is a wasteful number, since it uses less digits than its factorization.

545742990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3154 (or 3151 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The square root of 545742990 is about 23361.1427374604. The cubic root of 545742990 is about 817.2019394283.

The spelling of 545742990 in words is "five hundred forty-five million, seven hundred forty-two thousand, nine hundred ninety".