45780381 has 6 divisors (see below), whose sum is σ = 66127230. Its totient is φ = 30520248.

The previous prime is 45780377. The next prime is 45780391. The reversal of 45780381 is 18308754.

45780381 is a `hidden beast` number, since 4 + 578 + 0 + 3 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26936100 + 18844281 = 5190^2 + 4341^2 .

It is not a de Polignac number, because 45780381 - 2² = 45780377 is a prime.

It is a super-2 number, since 2×45780381² = 4191686569010322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45780341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2543346 + ... + 2543363.

It is an arithmetic number, because the mean of its divisors is an integer number (11021205).

Almost surely, 2^45780381 is an apocalyptic number.

It is an amenable number.

45780381 is a deficient number, since it is larger than the sum of its proper divisors (20346849).

45780381 is a wasteful number, since it uses less digits than its factorization.

45780381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086715 (or 5086712 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 45780381 is about 6766.1200846571. The cubic root of 45780381 is about 357.7336559154.

The spelling of 45780381 in words is "forty-five million, seven hundred eighty thousand, three hundred eighty-one".