1025440340 has 48 divisors (see below), whose sum is σ = 2335740624. Its totient is φ = 376627200.

The previous prime is 1025440337. The next prime is 1025440369. The reversal of 1025440340 is 430445201.

It can be written as a sum of positive squares in 8 ways, for example, as 188842564 + 836597776 = 13742^2 + 28924^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22841 + ... + 50720.

It is an arithmetic number, because the mean of its divisors is an integer number (48661263).

Almost surely, 2^1025440340 is an apocalyptic number.

1025440340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025440340 is an abundant number, since it is smaller than the sum of its proper divisors (1310300284).

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

1025440340 is a wasteful number, since it uses less digits than its factorization.

1025440340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73628 (or 73626 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1025440340 is about 32022.4974041688. The cubic root of 1025440340 is about 1008.4092004630.

Adding to 1025440340 its reverse (430445201), we get a palindrome (1455885541).

The spelling of 1025440340 in words is "one billion, twenty-five million, four hundred forty thousand, three hundred forty".