1400428 has 6 divisors (see below), whose sum is σ = 2450756. Its totient is φ = 700212.

The previous prime is 1400423. The next prime is 1400449. The reversal of 1400428 is 8240041.

It is a super-2 number, since 2×1400428² = 3922397166368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1400423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175050 + ... + 175057.

2^1400428 is an apocalyptic number.

It is an amenable number.

1400428 is a deficient number, since it is larger than the sum of its proper divisors (1050328).

1400428 is a wasteful number, since it uses less digits than its factorization.

1400428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350111 (or 350109 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1400428 is about 1183.3968058094. The cubic root of 1400428 is about 111.8802930197.

Adding to 1400428 its reverse (8240041), we get a palindrome (9640469).

The spelling of 1400428 in words is "one million, four hundred thousand, four hundred twenty-eight".