39897450 has 36 divisors (see below), whose sum is σ = 107192358. Its totient is φ = 10639200.

The previous prime is 39897443. The next prime is 39897461. The reversal of 39897450 is 5479893.

It can be written as a sum of positive squares in 3 ways, for example, as 15186609 + 24710841 = 3897^2 + 4971^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 39897396 and 39897405.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 43881 + ... + 44780.

Almost surely, 2^39897450 is an apocalyptic number.

39897450 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

39897450 is an abundant number, since it is smaller than the sum of its proper divisors (67294908).

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

39897450 is a wasteful number, since it uses less digits than its factorization.

39897450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88679 (or 88671 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 39897450 is about 6316.4428280481. The cubic root of 39897450 is about 341.7026758267.

The spelling of 39897450 in words is "thirty-nine million, eight hundred ninety-seven thousand, four hundred fifty".