1554405340 has 12 divisors (see below), whose sum is σ = 3264251256. Its totient is φ = 621762128.

The previous prime is 1554405337. The next prime is 1554405341. The reversal of 1554405340 is 435044551.

It is a happy number.

It is a super-2 number, since 2×1554405340² = 4832351922041031200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1554405341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38860114 + ... + 38860153.

It is an arithmetic number, because the mean of its divisors is an integer number (272020938).

Almost surely, 2^1554405340 is an apocalyptic number.

1554405340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1554405340 is an abundant number, since it is smaller than the sum of its proper divisors (1709845916).

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

1554405340 is a wasteful number, since it uses less digits than its factorization.

1554405340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77720276 (or 77720274 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 1554405340 is about 39425.9475472689. The cubic root of 1554405340 is about 1158.3898935973.

Adding to 1554405340 its reverse (435044551), we get a palindrome (1989449891).

The spelling of 1554405340 in words is "one billion, five hundred fifty-four million, four hundred five thousand, three hundred forty".