290136400 has 30 divisors (see below), whose sum is σ = 697053662. Its totient is φ = 116054400.

The previous prime is 290136391. The next prime is 290136401. The reversal of 290136400 is 4631092.

It can be written as a sum of positive squares in 3 ways, for example, as 1272384 + 288864016 = 1128^2 + 16996^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290136401) 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, 362271 + ... + 363070.

Almost surely, 2^290136400 is an apocalyptic number.

290136400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

290136400 is an abundant number, since it is smaller than the sum of its proper divisors (406917262).

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

290136400 is a wasteful number, since it uses less digits than its factorization.

290136400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725359 (or 725348 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 290136400 is about 17033.3907370200. The cubic root of 290136400 is about 662.0143539450.

Adding to 290136400 its reverse (4631092), we get a palindrome (294767492).

The spelling of 290136400 in words is "two hundred ninety million, one hundred thirty-six thousand, four hundred".