90390452 has 6 divisors (see below), whose sum is σ = 158183298. Its totient is φ = 45195224.

The previous prime is 90390409. The next prime is 90390463. The reversal of 90390452 is 25409309.

It can be written as a sum of positive squares in only one way, i.e., 78925456 + 11464996 = 8884^2 + 3386^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11298803 + ... + 11298810.

It is an arithmetic number, because the mean of its divisors is an integer number (26363883).

Almost surely, 2^90390452 is an apocalyptic number.

It is an amenable number.

90390452 is a deficient number, since it is larger than the sum of its proper divisors (67792846).

90390452 is a wasteful number, since it uses less digits than its factorization.

90390452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22597617 (or 22597615 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 90390452 is about 9507.3893367212. The cubic root of 90390452 is about 448.7876039696.

It can be divided in two parts, 90390 and 452, that multiplied together give a triangular number (40856280 = T₉₀₃₉).

The spelling of 90390452 in words is "ninety million, three hundred ninety thousand, four hundred fifty-two".