45557778 has 32 divisors (see below), whose sum is σ = 104361984. Its totient is φ = 12987792.

The previous prime is 45557777. The next prime is 45557819. The reversal of 45557778 is 87775554.

It is a happy number.

It is a super-2 number, since 2×45557778² = 4151022272594568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (45557777) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 24601 + ... + 26387.

It is an arithmetic number, because the mean of its divisors is an integer number (3261312).

Almost surely, 2^45557778 is an apocalyptic number.

45557778 is an abundant number, since it is smaller than the sum of its proper divisors (58804206).

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

45557778 is a wasteful number, since it uses less digits than its factorization.

45557778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406.

The product of its digits is 1372000, while the sum is 48.

The square root of 45557778 is about 6749.6502131592. The cubic root of 45557778 is about 357.1528976530.

The spelling of 45557778 in words is "forty-five million, five hundred fifty-seven thousand, seven hundred seventy-eight".