45399290 has 8 divisors (see below), whose sum is σ = 81718740. Its totient is φ = 18159712.

The previous prime is 45399287. The next prime is 45399293. The reversal of 45399290 is 9299354.

It is an interprime number because it is at equal distance from previous prime (45399287) and next prime (45399293).

It can be written as a sum of positive squares in 2 ways, for example, as 42680089 + 2719201 = 6533^2 + 1649^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×45399290² = 4122191065008200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45399293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2269955 + ... + 2269974.

Almost surely, 2^45399290 is an apocalyptic number.

45399290 is a deficient number, since it is larger than the sum of its proper divisors (36319450).

45399290 is a wasteful number, since it uses less digits than its factorization.

45399290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539936.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 45399290 is about 6737.8995243325. The cubic root of 45399290 is about 356.7382577732.

The spelling of 45399290 in words is "forty-five million, three hundred ninety-nine thousand, two hundred ninety".