1552320440 has 32 divisors (see below), whose sum is σ = 3810242160. Its totient is φ = 564480000.

The previous prime is 1552320433. The next prime is 1552320457. The reversal of 1552320440 is 440232551.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1763561 + ... + 1764440.

Almost surely, 2^1552320440 is an apocalyptic number.

1552320440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1552320440 is an abundant number, since it is smaller than the sum of its proper divisors (2257921720).

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

1552320440 is a wasteful number, since it uses less digits than its factorization.

1552320440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3528023 (or 3528019 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 1552320440 is about 39399.4979663447. The cubic root of 1552320440 is about 1157.8717516809.

Adding to 1552320440 its reverse (440232551), we get a palindrome (1992552991).

The spelling of 1552320440 in words is "one billion, five hundred fifty-two million, three hundred twenty thousand, four hundred forty".