45215890 has 16 divisors (see below), whose sum is σ = 82925208. Its totient is φ = 17744896.

The previous prime is 45215879. The next prime is 45215897. The reversal of 45215890 is 9851254.

It can be written as a sum of positive squares in 4 ways, for example, as 45198729 + 17161 = 6723^2 + 131^2 .

It is not an unprimeable number, because it can be changed into a prime (45215897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42127 + ... + 43186.

Almost surely, 2^45215890 is an apocalyptic number.

45215890 is a deficient number, since it is larger than the sum of its proper divisors (37709318).

45215890 is a wasteful number, since it uses less digits than its factorization.

45215890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85373.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 45215890 is about 6724.2761692245. The cubic root of 45215890 is about 356.2572363360.

The spelling of 45215890 in words is "forty-five million, two hundred fifteen thousand, eight hundred ninety".