45550000 has 60 divisors (see below), whose sum is σ = 110430432. Its totient is φ = 18200000.

The previous prime is 45549983. The next prime is 45550009. The reversal of 45550000 is 5554.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 45550000.

It is not an unprimeable number, because it can be changed into a prime (45550009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49545 + ... + 50455.

Almost surely, 2^45550000 is an apocalyptic number.

45550000 is a gapful number since it is divisible by the number (40) 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 45550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55215216).

45550000 is an abundant number, since it is smaller than the sum of its proper divisors (64880432).

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

45550000 is an frugal number, since it uses more digits than its factorization.

45550000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944 (or 918 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 45550000 is about 6749.0740105588. The cubic root of 45550000 is about 357.1325711323.

Adding to 45550000 its reverse (5554), we get a palindrome (45555554).

The spelling of 45550000 in words is "forty-five million, five hundred fifty thousand".