45778640 has 20 divisors (see below), whose sum is σ = 106435524. Its totient is φ = 18311424.

The previous prime is 45778633. The next prime is 45778651. The reversal of 45778640 is 4687754.

It can be written as a sum of positive squares in 2 ways, for example, as 11999296 + 33779344 = 3464^2 + 5812^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286037 + ... + 286196.

Almost surely, 2^45778640 is an apocalyptic number.

45778640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45778640 is an abundant number, since it is smaller than the sum of its proper divisors (60656884).

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

45778640 is a wasteful number, since it uses less digits than its factorization.

45778640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572246 (or 572240 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 41.

The square root of 45778640 is about 6765.9914277214. The cubic root of 45778640 is about 357.7291210602.

It can be divided in two parts, 457 and 78640, that added together give a palindrome (79097).

The spelling of 45778640 in words is "forty-five million, seven hundred seventy-eight thousand, six hundred forty".